After being snubbed by Santa at the mall, Stewie decides he's going murder Santa at the North Pole. Upon reaching their destination, Brian and Stewie learn that the world's greed and increasing demands are literally killing Santa and his elves.
In hope of saving Christmas, Stewie and Brian borrow Stanta's sleigh and embark on a present-giving journey around the world. Unfortunately, they only make it to one house—and commit murder instead.
Also worth mentioning is that Seth MacFarlane's father hilariously narrated the hour-long special, proving that the apple doesn't fall far from the tree.